Low Voltage EKG Activity Due to Scalp Edema; High Frequency Jet Respirator Artifact. An 18-day-old boy with diaphragmatic hernia, pulmonary hypoplasia,

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Date of download: 6/23/2016 Copyright © 2016 McGraw-Hill Education. All rights reserved. Supplementary Sensorimotor Area (SSMA) Seizure; Subdural vs Scalp.

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Presentation transcript:

Low Voltage EKG Activity Due to Scalp Edema; High Frequency Jet Respirator Artifact. An 18-day-old boy with diaphragmatic hernia, pulmonary hypoplasia, and severe scalp edema due to hypoalbuminemia who had been on ECMO since birth. Head CT showed significant extra-axial CSF space. His level of consciousness had been improving. EEG demonstrates very low-voltage background activity mainly caused by scalp edema. Note artifactual, low-voltage, rhythmic, 7-Hz theta activity in the right occipital electrode caused by the effect of high-frequency jet ventilator, which can vibrate a patient's entire body and the recording EEG electrodes (arrow). This artifact can mimic a focal electrographic seizure. Source: Artifacts, Atlas of Pediatric EEG Citation: Laoprasert P. Atlas of Pediatric EEG; 2011 Available at: http://neurology.mhmedical.com/DownloadImage.aspx?image=/data/books/1042/lao001_fig_02-63.gif&sec=59079119&BookID=1042&ChapterSecID=59078724&imagename= Accessed: October 04, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved